| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.ambari.server.agent; |
| |
| import com.google.gson.Gson; |
| |
| /** |
| * The base class for all agent commands. Concrete implementations are |
| * serialized by Gson ({@link Gson}) and should be annotated with Gson |
| * annotations (not Jackson). |
| */ |
| public abstract class AgentCommand { |
| |
| private AgentCommandType commandType; |
| |
| /** |
| * Constructor. Although not required for Gson, it's a good idea to have it so |
| * that we don't need to worry about unsafe object construction that bypasses |
| * the constructors. |
| * <p/> |
| * Subclasses should always use {@link #AgentCommand(AgentCommandType)} |
| */ |
| public AgentCommand() { |
| commandType = AgentCommandType.STATUS_COMMAND; |
| } |
| |
| /** |
| * Constructor. Must be invoked by all concrete subsclasses to properly set |
| * the type. |
| */ |
| public AgentCommand(AgentCommandType type) { |
| commandType = type; |
| } |
| |
| public enum AgentCommandType { |
| EXECUTION_COMMAND, |
| BACKGROUND_EXECUTION_COMMAND, |
| STATUS_COMMAND, |
| CANCEL_COMMAND, |
| REGISTRATION_COMMAND, |
| |
| /** |
| * Sends alert definitions to an agent which will refresh all alerts running |
| * on that host. |
| */ |
| ALERT_DEFINITION_COMMAND, |
| |
| /** |
| * A single alert that should be run immediately. |
| */ |
| ALERT_EXECUTION_COMMAND |
| } |
| |
| public AgentCommandType getCommandType() { |
| return commandType; |
| } |
| |
| public void setCommandType(AgentCommandType commandType) { |
| this.commandType = commandType; |
| } |
| |
| @Override |
| public String toString() { |
| return "AgentCommand{" + |
| "commandType=" + commandType + |
| '}'; |
| } |
| } |